1. [n]  the diffused light from the sky when the sun is below the horizon but its rays are refracted by the atmosphere of the earth
2. [n]  a state of diffused or dim illumination
3. [n]  a condition of decline following successes; "in the twilight of the empire"
4. [n]  the time of day immediately following sunset; "he loved the twilight"; "they finished before the fall of night"

Twilight
In this mysterious tale the fortunes of Port Frederick, Massachusettts, are riding on the upcoming Autumn Festival, sponsored by the Judy Foundation, founder and director, Jenny Cain. As if running the fair wasn`t enough, Jenny`s life and her own fortunes become much more complicated when she is swept into a long-running, deadly controversy which, to her horror, threatens disaster for those she holds dear.

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1. \Twi"light`\, n. [OE. twilight, AS. twi- (see {Twice})
   + le['o]ht light; hence the sense of doubtful or half light;
   cf. LG. twelecht, G. zwielicht. See {Light}.]
   1. The light perceived before the rising, and after the
      setting, of the sun, or when the sun is less than 18[deg]
      below the horizon, occasioned by the illumination of the
      earth's atmosphere by the direct rays of the sun and their
      reflection on the earth.
   2. faint light; a dubious or uncertain medium through which
      anything is viewed.
            As when the sun . . . from behind the moon, In dim
            eclipse, disastrous twilight sheds.   --Milton.
            The twilight of probability.          --Locke.
   

2. \Twi"light`\, a.
   1. Seen or done by twilight. --Milton.
   2. Imperfectly illuminated; shaded; obscure.
            O'er the twilight groves and dusky caves. --Pope.